The Image > Rotate -- Automatic deskew tool currently lacks the anti-aliasing option ('smoothing') option included in the Rotate > Rotate... user selectable angle rotate tool.
Also, if possible use either 'Smooth' or 'Anti-aliasing' consistently in XnView MP and XnConvert, assuming that the action is the same.
Add Anti-aliasing option to Image > Rotate -- Automatic deskew tool
Moderators: helmut, XnTriq, xnview